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- W2040953721 abstract "The 57 Fe Mößbauer spectra of mixed ligand complexes of the type trans-Fe(CO) 3 L 1 L 2 (L 1 = triphenylphosphine or triphenylphosphite and L 2 = phosphine or phosphite) show a quadrupolesplitting doublet typical of the disubstituted iron carbonyls in trigonal bipyramidal symmetry. The inverse linear dependence of the isomer shifts on the CO stretching frequencies is interpreted on the basis of the strengthening triple-bond nature of the carbonyl ligands with increasing iron-to-phosphorus π-back donation. A linear correlation, with a positive slope, between the isomer shifts and the quadrupole splittings has revealed that the phosphorus-to-iron σ-donation is offset by the iron-to-phosphorus π-back donation. A correlation between the coordination shifts and the isomer shifts demonstrates that the iron-to-phosphorus π-back donation plays an important role in the Fe-P bond. The relatively large coupling constant of 2 J(P,P) reflects a strong interaction between trans-phosphorus ligands through the P-Fe-P bond" @default.
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- W2040953721 date "1989-06-01" @default.
- W2040953721 modified "2023-09-27" @default.
- W2040953721 title "Preparation and Spectroscopic Characterization of trans-Fe(CO)3L1L2 (L1, L2 = Phosphine or Phosphite)" @default.
- W2040953721 doi "https://doi.org/10.1515/znb-1989-0605" @default.
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